JPS6220977A - Closing gear for baffle - Google Patents

Abstract

PURPOSE:To make it possible to accurately control a baffle opening and to inexpensively produce its closing gear by controlling the closing of the baffle used for a forced circulation type electric refrigerator or a car air conditioner through a wide use reversible motor. CONSTITUTION:A baffle 5 for the opening end 1a of a duct 1 is opened or closed according to a baffle opening controlled by the rotation amount of a lever 6. The rotation amount of the lever 6 is controlled by a screw 20 which is rotated by a wide use reversible motor through a gear group and a slider 21 fixed to the lever 6, and a gear 19 of the gear group is equipped with a magnet 22, which detects the number of revolutions of the gear 19 in cooperation with a lead switch 23. Thus, the above detected value causes feed back action to actuate the motor 10, and thereby the opening of the baffle 5 can be accurately controlled.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a forced jI5 ring electric refrigerator, a showcase,
The present invention relates to a baffle opening/closing device used in car air conditioners and the like, and particularly to a device that uses a motor to open/close the baffle.

(Prior Art) For example, in an electric refrigerator, in order to control the temperature inside the refrigerator, a panful opening device is installed to RrA a duct that allows cold air to flow into the refrigerator. Conventionally, mechanical devices, electromagnetic devices, devices using stepping motors, etc. are known.

[Problem that the invention seeks to solve]

In the above-mentioned conventional mechanical device, the main body of the device that opens and closes the baffle is provided with an operating section for setting the temperature by adjusting the degree of opening of the baffle. Since the operating parts are located close to each other, it is difficult to operate when setting the temperature, and the mechanism also has the drawback that it cannot be controlled by a microcomputer, which has been increasingly adopted in recent years.

Electromagnetic devices were developed to overcome the drawbacks of mechanical devices. For example, by moving the plunger forward and backward by operating an electromagnetic coil,
The structure is such that the baffle connected to the plunger 17- via a lever opens and closes, but the operation of the device is accompanied by an unpleasant sound, and depending on the position of the plunger, the baffle may be in the same state or at a constant opening. There were problems such as the opening of the baffle could not be adjusted because the baffle was only set to two identical states.

A device using a stepping motor was proposed to eliminate the drawbacks of mechanical devices and electromagnetic devices as described above, but because it uses a stepping motor, it has extremely serious problems. There was a point.

An object of the present invention is to be able to continuously adjust the opening degree of a baffle that opens and closes a duct, and to perform accurate control of the opening degree of the baffle, for example, in order to accurately adjust the temperature inside a refrigerator. An object of the present invention is to obtain a baffle opening/closing device that can be used and is inexpensive.

[Means for solving problems]

The baffle opening/closing device of the present invention includes a baffle that approaches and separates from the open end of a duct to open and close the open end of the duct, and a baffle that is rotatably connected to one end and rotated to a fixed part at the other end. a lever that is freely supported and opens or opens the baffle at a predetermined opening degree depending on the amount of rotation; a screw that is rotated by a motor via a gear; a slider that is engaged with the lever and moves forward and backward as the screw rotates, and rotates the lever by a predetermined amount in accordance with the movement; a permanent magnet provided on the gear; and a permanent magnet provided on the gear; It is equipped with a reed switch that opens and closes when a magnet approaches or moves away, and the opening degree of the baffle is continuously changed by the rotation of the motor. This feature is characterized by the ability to control the temperature.

[Effect]

In the baffle opening/closing device of the present invention, a motor rotates a screw through a gear, moves a slider screwed onto the screw forward and backward, rotates a lever engaged with the slider, and rotates a lever engaged with the slider. By closing the baffle provided at one end or opening it at a predetermined opening depending on the amount of movement of the slider, for example, a duct that allows cold air to flow into the refrigerator h1 can be opened and closed, and the temperature inside the refrigerator can be adjusted. The microcomputer to which this reed switch is connected is adjusted, and the permanent magnet provided on the gear moves toward or away from the reed switch as the gear rotates, opening and closing the reed switch. − etc. detect the rotation speed of the gear,
Thereby, the opening degree of the baffle is controlled through control of a motor or the like.

〔Example〕

The structure of one embodiment of the baffle opening/closing device of the present invention will be explained with reference to FIGS. 1 and 2. FIG.

The baffle opening/closing device of this embodiment is used in a forced circulation electric refrigerator, and controls the temperature inside the refrigerator by opening and closing the opening end 1a of the duct 1 that allows cold air to flow into the refrigerator. .

Reference numeral 2 denotes a main body, which is composed of a case body 3 having a planar shape with an open negative side, and an integral cover 4 that closes the opening surface of the case body 3.

Reference numeral 5 denotes a plate-shaped baffle that opens and closes the open end 1a of the duct 1. One end of a m-long plate-shaped lever 6 is rotatably attached to this baffle 5 by a support shaft 7, and the other end of this lever 6 protrudes from the outer surface of the main body 1 and is fixed. The lever 6 is rotatably attached to the protrusion 3a by a support shaft 8, and an elongated hole 6a extending in the longitudinal direction is formed in the center of the lever 6. Further, both ends of a spring 90 are engaged with the baffle 5 and the lever 6, respectively, and the spring 9 causes the baffle 5 to move toward the lever 6 at its one end (
(lower part in the figure) is urged toward the duct l-1 side.

Further, a reversible motor 10 that rotates in both forward and reverse directions is provided within the main body 2, and a motor pinion 11 as a gear is fixed to a rotating shaft 10a of this motor 10. Furthermore, a first shaft 12, a second shaft 13, and a third shaft 14 are supported within the main body 2 on both sides thereof, and are rotatably connected to the motor 10.
It is provided in parallel with the rotation @10a. A first gear 15 meshed with the motor binion 11 and a first binion 1G are fixed to the first shaft 12, and a first gear 15 and a first binion 1G are fixed to the second shaft 13. pinion 16
A second gear 17 and a second pinion 18 that are meshed with each other are fixedly installed, and a third gear 19 that is meshed with the second pinion 18 is fixedly installed on the third shaft 14. J3, the rotation of the motor 10 is transmitted to the third shaft 14 at a reduced speed.

Further, one side of the third shaft 14 is formed with a screw 20 projecting outward from the main body 2, and a slider 21 is screwed onto the screw 20 so as to be movable forward and backward. Further, this slider 21 is provided with a protrusion 21a, and this protrusion 21a is slidably engaged with the elongated hole 6a of the lever 6.

Further, a permanent magnet 22 is attached to the periphery of the third gear 19.
A reed switch 23 is provided in the main body 2 at a position facing the permanent magnet 22 with a small gap therebetween, which opens and closes as the permanent magnet 22 approaches and leaves. There is.

Next, the operation of this embodiment will be explained.

Based on the temperature inside the cold Rja detected by a sensor (not shown), a control unit such as a microcomputer calculates the opening degree of the baffle 5 and rotates the motor 10 by a predetermined amount in a predetermined direction. As the motor 10 rotates, the motor pinion 11, the first gear 15, and the first
pinion 16, second gear 17, second pinion 18
, the screw 20 rotates via the third gear 19.

Furthermore, as the screw 20 rotates, the slider 2
1 moves, the protrusion 21 of this slider 21
The lever 6, whose portion a is engaged with the elongated hole 6a, rotates around the support @8. When the lever 6 rotates, the baffle 5, which is biased by the spring 9 against the lever 6, rotates around the support shaft 7 with one end of the baffle 5 on the main body 2 side in contact with the duct 1, and The opening end 1a is opened at a predetermined opening degree.

At this point, the degree of opening of the baffle 5, that is, the angle between the baffle 5 and the open end 1a of the duct 1, is determined depending on the position of the slider 21. That is, as shown in FIG. 1, when the slider 21 is located on the side opposite to the main body 2 of the screw 20, the baffle 5
1a is closed, and as the slider 21 approaches the main body 2 side from that position, the baffle 5 hears with a larger opening degree. In addition, the slider 21 is moved by the screw 2.
Since it is determined according to the rotation speed of 0, the opening degree of the baffle 5 is ultimately determined according to the rotation speed of the motor 10 controlled by the micro combi coater.

(2) When the baffle 5 opens, cold air flows into the refrigerator from the opened duct 1, and the temperature inside the refrigerator decreases.Then, the larger the opening of the baffle 5, the more Since the cold air hangs larger, cooling is performed more quickly.In this way, by closing the baffle 5 or opening it at a predetermined opening degree, the temperature inside the refrigerator can be controlled appropriately.

Further, as the screw 20 rotates, the third gear 19
When the third tooth Tj119 rotates, the permanent magnet 22 provided on the third tooth Tj119 approaches or moves away from the reed switch 23, so that the reed switch 23 opens and closes.

The opening/closing signal of the reed switch 23 is sent to the microcomputer, and the number of rotations of the third gear 19 is detected based on the signal. As a result, the position of the slider 21 and the opening degree of the baffle 5 are accurately detected, and based on this, the microcomputer controls the motor 10 so that the opening degree of the baffle 5 is appropriate.

Further, since the opening degree of the baffle 5 is controlled by such a mechanism, the motor 10 may be an inexpensive direct current type general-purpose reversible motor.

In the above embodiment, the opening degree of the baffle 5 is increased as the slider 21 approaches the main body 2. However, as shown in FIG. A lever 6 may be provided on the opposite side so that the farther the slider 21 is from the main body 2, the greater the opening degree of the baffle 5.

〔Effect of the invention〕

According to the present invention, a slider is screwed to a screw rotated by a motor through a gear so that it can move forward and backward, and a lever that is engaged with the slider and a baffle that is rotatably attached to the lever are attached to the screw. Since the baffle is opened and closed by rotating the slider by an amount corresponding to the amount of movement of the slider, it is possible to continuously change the opening degree of the baffle depending on, for example, the temperature inside the refrigerator. I can do it, and also.
A permanent magnet is provided on the gear, and a reed switch is provided that opens and closes when the permanent magnet approaches or moves as the main body rotates, so that the number of rotations of the gear can be detected, so the opening degree of the baffle can be adjusted as desired. By,
The opening degree of this baffle can be precisely controlled, and since the opening degree of the baffle is controlled in this way, the motor can be a direct current type general-purpose reversible motor, which makes it possible to open and close the baffle at low cost. equipment can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a baffle closed state showing one embodiment of the baffle opening/closing device of the present invention, FIG. 2 is a sectional view of the same baffle opened, and FIG. 3 is another embodiment of the present invention. FIG. 2 is a cross-sectional view of an example baffle opening/closing device. 1...Duct, 1a...Open end of duct 1, 3a...Protrusion serving as a fixing part, 5...Baffle, 6...Lever, 10
...Motor, 11.. Motor binion as gear, 15.. First gear, 16.. First gear as gear, 17.. Second gear, 18.. as gear. 2nd pinion, 19...Third gear, 20...Screw, 21...Slider, 22...Permanent magnet, 23...
Reed switch.

Claims (1)

[Claims] (1) A baffle that approaches and separates from the opening end of the duct to open and close the opening end of the duct, and this baffle is rotatably connected to one end and the other end is rotatably supported on a fixed part, and the amount of rotation is a lever that closes or closes the baffle at a predetermined opening degree according to the opening; a screw that is rotated by a motor through a gear; A slider that moves forward and backward as the screw rotates and rotates the lever by a predetermined amount according to the amount of movement, a permanent magnet provided on the gear, and opening/closing by the approach or separation of the permanent magnet as the gear rotates. and a reed switch that continuously changes the opening degree of the baffle by rotation of the motor, and controls the opening degree of the baffle by detecting the rotation speed of a gear by opening and closing the reed switch. Features a baffle opening/closing device.